Sending method and device for 8-antenna downlink control channel

Abstract

A method for an 8-antenna downlink control channel, is described. the method includes virtualizing a first pair and a third pair of dual-polarized antennas as a first port, and virtualizing a second pair and a fourth pair of dual-polarized antennas as a second port. The weighted values of the broadcast right of the four antennas in the first port satisfy that the weighted value of one antenna is +1 and the weighted values of the other three antennas are −1, or the weighted value of one antenna is −1 and the weighted values of the other three antennas are +1, and weighted values of the broadcast right of the four antennas in the second port satisfy that the weighted value of one antenna is +1 and the weighted values of the other three antennas are −1.

1 . A method of transmitting a downlink control channel on 8 antennas, comprising:
 for the 8 antennas used by a base station for downlink transmission, virtualizing 4 antennas among the 8 antennas into a first port and virtualizing the other 4 antennas among the 8 antennas into a second port,   wherein broadcast weights of the 4 antennas of the first port satisfy that the weight of one of the antennas is +1 and the weights of the remaining three antennas are −1, or the weight of one of the antennas is −1 and the weights of the remaining three antennas are +1, and   broadcast weights of the 4 antennas of the second port satisfy that the weight of one of the antennas is +1 and the weights of the remaining three antennas are −1, or the weight of one of the antennas is −1 and the weights of the remaining three antennas are +1; and   the base station transmitting a downlink control signal through the first port and the second port.   
     
     
         2 . The method of  claim 1 , wherein the first and third pairs of dual-polarized antennas among the 8 antennas are virtualized into the first port and the second and fourth pairs of dual-polarized antennas among the 8 antennas are virtualized into the second. 
     
     
         3 . The method of  claim 1 , wherein
 the first and fourth pairs of dual-polarized antennas among the 8 antennas are virtualized into the first port and the second and third pairs of dual-polarized antennas among the 8 antennas are virtualized into the second port.   
     
     
         4 . (canceled) 
     
     
         5 . The method of  claim 1 , wherein
 the antennas in the direction of +45 degrees among the first and second pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of −45 degrees among the third and fourth pairs of dual-polarized antennas of the 8 antennas are virtualized into the first port and  the antennas in the direction of −45 degrees among the first and second pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of +45 degrees among the third and fourth pairs of dual-polarized antennas of the 8 antennas are virtualized into the second port.   
     
     
         6 . (canceled) 
     
     
         7 . The method of  claim 1 , wherein the antennas in the direction of +45 degrees among the first and third pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of −45 degrees among the second and fourth pairs of dual-polarized antennas of the 8 antennas are virtualized into the first port and the antennas in the direction of −45 degrees among the first and third pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of +45 degrees among the second and fourth pairs of dual-polarized antennas of the 8 antennas are virtualized into the second port. 
     
     
         8 . (canceled) 
     
     
         9 . The method of  claim 1 , wherein
 the antennas in the direction of +45 degrees among the first and fourth pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of −45 degrees among the second and third pairs of dual-polarized antennas of the 8 antennas are virtualized into the first port and the antennas in the direction of −45 degrees among the first and fourth pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of +45 degrees among the second and third pairs of dual-polarized antennas of the 8 antennas are virtualized into the second port.   
     
     
         10 . (canceled) 
     
     
         11 . The method of  claim 1 , wherein
 the antennas in the direction of +45 degrees among the first, second, third and fourth pairs of dual-polarized antennas of the 8 antennas are virtualized into the first port and the antennas in the direction of −45 degrees among the first, second, third and fourth pairs of dual-polarized antennas of the 8 antennas are virtualized into the second port.   
     
     
         12 . The method of  claim 1 , wherein the base station is a Long Term Evolution, LTE, Time Division Duplex, TDD, base station or an LTE-A TDD base station or an LTE Frequency Division Duplex, FDD, base station or an LTE-A FDD base station. 
     
     
         13 . An apparatus for transmitting a downlink control channel on 8 antennas, comprising:
 a port grouping module configured, for the 8 antennas used by a base station for downlink transmission, to virtualize 4 antennas among the 8 antennas into a first port and virtualize the other 4 antennas among the 8 antennas into a second port, wherein broadcast weights of the 4 antennas of the first port satisfy that the weight of one of the antennas is +1 and the weights of the remaining three antennas are −1, or the weight of one of the antennas is −1 and the weights of the remaining three antennas are +1; and broadcast weights of the 4 antennas of the second port satisfy that the weight of one of the antennas is +1 and the weights of the remaining three antennas are −1, or the weight of one of the antennas is −1 and the weights of the remaining three antennas are +1; and   a downlink control signal transmitting module configured to transmit a downlink control signal through the first port and the second port obtained by the port grouping module.   
     
     
         14 . The apparatus of  claim 13 , wherein the port grouping module is configured to virtualize the first and third pairs of dual-polarized antennas among the 8 antennas into the first port and virtualize the second and fourth pairs of dual-polarized antennas among the 8 antennas into the second port. 
     
     
         15 . The apparatus of  claim 13 , wherein the port grouping module is configured to virtualize
 the first and fourth pairs of dual-polarized antennas among the 8 antennas into the first port and virtualize the second and third pairs of dual-polarized antennas among the 8 antennas into the second port.   
     
     
         16 . (canceled) 
     
     
         17 . The apparatus of  claim 13 , wherein the port grouping module is configured
 to virtualize the antennas in the direction of +45 degrees among the first and second pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of −45 degrees among the third and fourth pairs of dual-polarized antennas of the 8 antennas into the first port and virtualize the antennas in the direction of −45 degrees among the first and second pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of +45 degrees among the third and fourth pairs of dual-polarized antennas of the 8 antennas into the second port.   
     
     
         18 . (canceled) 
     
     
         19 . The apparatus of  claim 13 , wherein the port grouping module is configured
 to virtualize the antennas in the direction of +45 degrees among the first and third pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of −45 degrees among the second and fourth pairs of dual-polarized antennas of the 8 antennas into the first port and virtualize the antennas in the direction of −45 degrees among the first and third pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of +45 degrees among the second and fourth pairs of dual-polarized antennas of the 8 antennas into the second port.   
     
     
         20 . (canceled) 
     
     
         21 . The apparatus of  claim 13 , wherein the port grouping module is configured
 to virtualize the antennas in the direction of +45 degrees among the first and fourth pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of −45 degrees among the second and third pairs of dual-polarized antennas of the 8 antennas into the first port and virtualize the antennas in the direction of −45 degrees among the first and fourth pairs of dual-polarized antennas of the 8 antennas and the antennas in the direction of +45 degrees among the second and third pairs of dual-polarized antennas of the 8 antennas into the second port.   
     
     
         22 . (canceled) 
     
     
         23 . The apparatus of  claim 13 , wherein the port grouping module is configured
 to virtualize the antennas in the direction of +45 degrees among the first, second, third and fourth pairs of dual-polarized antennas of the 8 antennas into the first port and virtualize the antennas in the direction of −45 degrees among the first, second, third and fourth pairs of dual-polarized antennas of the 8 antennas into the second port.   
     
     
         24 . The apparatus of  claim 13 , wherein the apparatus is located on a Long Term Evolution, LTE, Time Division Duplex, TDD, base station or on an LTE-A TDD base station or on an LTE Frequency Division Duplex, FDD, base station or on an LTE-A FDD base station.